package com.itheima_07;

public class StringDemo2 {
    public static void main(String[] args) {
         int[] arr = {1,2,3};
         String s = arrayToString(arr);
        System.out.println("s:"+s);
    }
    public static String arrayToString(int[] arr){
        String s = "";
        s += "[";
        for (int i = 0; i < arr.length; i++) {
            if(i == arr.length - 1){
                s += arr[i];
            }else{
                s += arr[i] + ",";
            }
        }
        s += "]";
        return s;
    }
}
